Transfer of 90Sr to rice plants after its acute deposition onto flooded paddy soils

Choi, Yong-Ho; Kang, Hee-Seok; Jun, In; Keum, Dong-Kwon; Park, Hyo-Kook; Choi, Geun-Sik; Lee, Hansoo; Lee, Chang-Woo

doi:10.1016/j.jenvrad.2006.12.008

Cited by 10 publications

(6 citation statements)

References 23 publications

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“…Experiments on root uptake and foliar uptake for the same deposition times would be highly informative. Sr (Choi et al, 2007b) Brown rice 83 62 Total 5 6.4 Â 10 À4 3.3 Â 10 À4 5.7 Â 10 À4 1.78 2.5 Â 10 À4 1.1 Â 10 À3 Loam 3 6.2 Â 10 À4 1.9 Â 10 À4 6.0 Â 10 À4 1.40 4.1 Â 10 À4 7.8 Â 10 À4 Sand 2 6.8 Â 10 À4 6.0 Â 10 À4 --2.5 Â 10 À4 1.1 Â 10 À3 Straw 83 62 Total 5 2.1 Â 10 À2 7.5 Â 10 À3 2.0 Â 10 À2 1.40 1.4 Â 10 À2 3.3 Â 10 À2 Loam 3 1.8 Â 10 À2 4.7 Â 10 À3 1.7 Â 10 À2 1.29 1.4 Â 10 À2 2.3 Â 10 À2 Sand 2 2.6 Â 10 À2 9.9 Â 10 À3 --1 . 9 Â 10 À2 3.3 Â 10 À2 137 Cs (Choi et al, 2005) Brown rice 12 133 Total 3 2.8 Â 10 À4 1.6 Â 10 À4 2.5 Â 10 À4 1.87 1.3 Â 10 À4 4.5 Â 10 À4 Loam 2 2.9 Â 10 À4 2.3 Â 10 À4 --1 .…”

Section: Discussionunclassified

“…Undisturbed soil blocks collected into lysimeters from eight paddy fields were used in this experiment (Choi et al, 2005(Choi et al, , 2007b. The lysimeters were 0.3 m wide, 0.3 m long and 0.4 m high.…”

Section: Experiments IImentioning

confidence: 99%

“…For rice, further experiments were performed to measure the T a ag values for 90 Sr and 137 Cs in various paddy soils (Choi et al, 2005(Choi et al, , 2007b. The results of these experiments are summarized in Table 7.…”

Section: Sr and 137 Cs T A Ag Values To Rice From Various Soils (Ementioning

confidence: 99%

“…This makes the use of F v values inappropriate and may make it necessary to use aggregated transfer factors (T ag , m 2 kg À1 -plant) (IAEA, 1994;ICRU, 2001) specified for the time periods from deposition until harvest ðT a ag Þ (Choi et al, 1995(Choi et al, , 1998(Choi et al, , 2005(Choi et al, , 2007b.…”

Section: Introductionmentioning

confidence: 99%

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Root uptake of radionuclides following their acute soil depositions during the growth of selected food crops

Choi

Lim

Jun

et al. 2009

Journal of Environmental Radioactivity

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Section: Discussionunclassified

Section: Experiments IImentioning

confidence: 99%

Section: Sr and 137 Cs T A Ag Values To Rice From Various Soils (Ementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Root uptake of radionuclides following their acute soil depositions during the growth of selected food crops

Choi

Lim

Jun

et al. 2009

Journal of Environmental Radioactivity

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“…This factor depends on the phenological stage of the plant and thus takes account of the physiological change of activity and the development of the different parts of the plant with time. The values used result from a review of the literature data [5][6][7][8].…”

Section: Transfer By Watermentioning

confidence: 99%

Study of the radioecological sensitivity of rice to radioactive contamination

Pey¹,

Mercat-Rommens²,

Audebert

et al. 2009

Radioprotection

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Abstract. This study focused on the radioecology of rice and explored how the French specificities of rice cultivation can be taken into account in risk assessment. The objective of the study was to characterize the radioecological sensitivity of rice with respect to an accidental release of radioactivity. We want to know if a uniform and specific deposit would involve the same contamination on representative paddy fields of Camargue. To model the transfer of the radionuclides in the rice caryopsis following an accidental atmospheric pollution, we used the classical modelling for the cereals which considers first the interception by the foliage (modelled by an interception ratio) then the translocation to the grain (modelled by a translocation factor). The values of the parameters (interception ratio, translocation factor and yield) were regionalized with the agronomical software ORIZA2000, developed by the IRRI (International Rice Research Institute). We partly calibrated ORIZA2000 for a French rice variety: Ariete, thanks to physiological data provided for International Cooperation Centre in Agronomical Research for Development (CIRAD). ORIZA2000 proposes a daily follow-up of the leaf area index which can be correlated with the interception ratio. Five simulations with various climates, irrigation managements, and technical uses have been inputted on ORIZA2000. The data inputted were extracted from the database AGROSYST from the French Institute for Agronomical Research (INRA) and from the CIRAD. We established two scenarios of contamination. The first one consisted in a single contamination of water. In this case, there is almost no difference between simulations. However, in each simulation (except for organic farming) it is relevant to notice that the fourth depletion of water leads to a significant variation of contamination. The second contamination scenario consisted in a double contamination of water and of air. In that case, technical practices are responsible of the highest source of variability of the grain contamination. The variability of the contamination is mainly due to the variability of the yield which has in the radioecological modelling a dilution effect. The rice produced by organic farming is more sensitive than the rice produced by conventional farming because of low yields.

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Strontium: Radionuclides

Guillén¹,

Baeza²,

Salas³

2005

Encyclopedia of Inorganic Chemistry

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Strontium has several radioactive isotopes, with 90 Sr being the most important in the environment. This radionuclide dispersed worldwide as a consequence of the atmospheric nuclear weapon tests in the 1960s, and is locally enhanced owing to the accidents involving radioactive material. 90 Sr is a pure β‐emitter and it may be detected by several detection techniques (gas‐flow proportional, liquid scintillation, Cerenkov counting, and ICP‐MS), after an appropriate radiochemical separation. The environmental behavior of radiostrontium is governed by its chemical similarities to calcium. It is usually associated with the mobile and bioavailable fractions in soils, and with the low MW fraction in aquatic ecosystems. The potential human exposure to radiostrontium is mainly due to the ingestion of food, milk and cereals being the two major sources. This exposure can be reduced to some extent by the addition of calcium fertilizers to minimize the soil‐to‐plant transfer of radiostrontium, and by increasing cattle calcium intake to decrease the 90 Sr content in milk.

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Transfer of 90Sr to rice plants after its acute deposition onto flooded paddy soils

Cited by 10 publications

References 23 publications

Root uptake of radionuclides following their acute soil depositions during the growth of selected food crops

Root uptake of radionuclides following their acute soil depositions during the growth of selected food crops

Study of the radioecological sensitivity of rice to radioactive contamination

Strontium: Radionuclides

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